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Here is source code of the Program to Cancel an Alarm Intent in Android. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.

MainActivity.java

package com.example.cancel_alarm_intent;
 
import java.util.Calendar;
 
import android.os.Bundle;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
 
public class MainActivity extends Activity implements OnClickListener {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button start = (Button) findViewById(R.id.button1);
        Button end = (Button) findViewById(R.id.button2);
        start.setOnClickListener(this);
        end.setOnClickListener(this);
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
 
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        Intent intent = new Intent(this, MyService.class);
        startService(new Intent(this, MyService.class));
        Calendar cal = Calendar.getInstance();
        PendingIntent pintent = PendingIntent.getService(this, 0, intent, 0);
 
        AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
 
        switch (v.getId()) {
 
        case R.id.button1:
            // Start service every 20 seconds
            Toast.makeText(getApplicationContext(), "Alarm Evoked",
                    Toast.LENGTH_LONG).show();
            alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
                    20 * 1000, pintent);
 
            break;
        case R.id.button2:
            Toast.makeText(getApplicationContext(), "Alarm Canceled",
                    Toast.LENGTH_LONG).show();
            alarm.cancel(pintent);
            break;
        default:
            break;
        }
    }
 
}

MyService.java

package com.example.cancel_alarm_intent;
 
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
 
public class MyService extends Service {
 
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
 
    @Override
    public void onCreate() {
        Toast.makeText(this, " MyService Created ", Toast.LENGTH_LONG).show();
    }
 
    @Override
    public void onStart(Intent intent, int startId) {
        Toast.makeText(this, " MyService Started", Toast.LENGTH_LONG).show();
    }
 
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        Toast.makeText(this, "Servics Stopped", Toast.LENGTH_SHORT).show();
        super.onDestroy();
    }
 
}

Activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="71dp"
        android:text="Start Stop Alarm Intent"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="108dp"
        android:text="Start" />
 
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button1"
        android:layout_alignBottom="@+id/button1"
        android:layout_alignRight="@+id/textView1"
        android:text="Cancel" />
 
</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.cancel_alarm_intent"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
 
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.cancel_alarm_intent.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
 
        <service
            android:name=".MyService"
            android:enabled="true" />
    </application>
 
</manifest>

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089 Java Android Program to Cancel an Alarm Intent

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